Side view of Dune 45 showing sand blowing in the wind and the sunlit ridge against blue sky, Namib Desert near Sesriem, Namib Naukluft Park, Namibia, Africa

Grand Canyon, Mohave Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Sunrise over Derwentwater from the ridge leading to Catbells in the Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

Sunrise over Derwentwater from the ridge leading to Catbells in the Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

Sunrise over Derwentwater from the ridge leading to Catbells in the Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

A' Mhaighdean summit ridge, one of the remotest Scottish Munros, one of the finest viewpoints in Britain, Highlands, Scotland, United Kingdom, Europe

Sheep on a sunlit ridge, Valgerola, Orobie Alps, Valtellina, Lombardy, Italy, Europe

Plains zebra (Equus quagga) stands on ridge in sun, Grumeti Serengeti Tented Camp, Serengeti National Park; Tanzania

The Blue Duck lodge located in the Whanganui National Park is a working cattle farm with a focus on conservation. Travellers go to a scenic viewpoint to watch the sunrise over the rainforest; Retaruke, Manawatu-Wanganui, New Zealand

Hiking trail through Snow Canyon, with circles of stones in a meeting area behind the Red Mountain Spa, with meditation maze and Snow Canyon Mountain Range in the background. Red Cliffs Desert Reserve around St George Town with bright sunburst in a blue sky, St George, Utah, United States of America

Hiking trail through Snow Canyon, with circles of stones in a meeting area behind the Red Mountain Spa, with meditation maze and Snow Canyon Mountain Range in the background. Red Cliffs Desert Reserve around St George Town with rock cliffs and dark clouds in a blue sky, St George, Utah, United States of America

Lesser flamingo (Phoeniconaias minor) flying above sand dunes near Walvis Bay, Namibia

Hiking trail through Snow Canyon, with circles of stones in a meeting area behind the Red Mountain Spa, with meditation maze and Snow Canyon Mountain Range in the background. Red Cliffs Desert Reserve around St George Town with rock cliffs and dark clouds in a blue sky, St George, Utah, United States of America

View taken from behind of two women sitting on a mountain top with their dog enjoying the view, while exploring and photographing the amazing scenery of the Yukon along the Sam McGee Trail near Carcross, Yukon, Carcross, Yukon Territory, Canada

View taken from behind of two women standing on a mountain top with arms around shoulders, enjoying the view, while exploring and photographing the amazing scenery of the Yukon up along the Sam McGee Trail near Carcross, Yukon, Carcross, Yukon Territory, Canada

Snow-covered mountain peaks on a bright sunny day near Knik Glacier, Alaska, United States of America

Autumn scene in the Blue Ridge Mountains with vibrant autumn coloured foliage in North Carolina, USA, Fairview, North Carolina, United States of America

The beautiful snow-capped mountains of the North Fjords in North Iceland with a bright, blue sky above them, North Iceland, Iceland

View taken from behind of a woman in a straw hat sitting on the top of a mountain cliff looking out onto the brilliant, blue water of the Pacific Ocean and mountainous coastline along the Kalalau Trail on the Napali Coast, Kauai, Hawaii, United States of America

Beautiful reflections of the mountains in Tincup Lake, near Burwash Landing, Yukon, Canada

Snow-clad mountains in early winter in the Kaldidalur Valley, seen from Langjokull Glacier, in the western Highlands of west Iceland, Iceland

Scenic view from the green covered mountain cliffs of the Napali Coast along the Kalalau Trail on the Hawaiian Island of Kauai, with the calm, blue waters of the Pacific Ocean lapping the shore, Kauai, Hawaii, United States of America

The sacred city of Machu Picchu sunlit and enveloped in low clouds; Cusco, Peru

View taken from behind of a person walking down a mountainside with a spectacular view of the Kusawa Lake below, Yukon, Canada

Scenic of the Blue Ridge Parkway on a bright springtime day, North Carolina, USA, North Carolina, United States of America

Surrounded by patches of Rice Coral (Montipora capitata), a Red Slate Pencil Urchin (Heterocentrotus mamillatus) and a Needle-spined (Urchin Echinostrephus aciculatus) rest on Molokini Backwall which is located offshore of Maui, Hawaii, USA; Molokini Crater, Maui, Hawaii, United States of America

The strenuous yet highly rewarding hike to Roys Peak in Wanaka. The hike is difficult but the views are spectacular; Wanaka, Otago, New Zealand

Hazy view of the steep, silhouetted mountain cliffs of the Napali Coast along the Kalalau Trail on the Hawaiian Island of Kauai against the blue waters of the Pacific Ocean, Kauai, Hawaii, United States of America

Two female Gray wolves (Canis lupus) looking out with a mountain in the background, Alaska Wildlife Conservation Center; Portage, Alaska, United States of America

Plains zebra (Equus quagga) stands on ridge in sun, Grumeti Serengeti Tented Camp, Serengeti National Park; Tanzania